Its an 88 Toyota 4x4 V6 EFI, so not quite new enough to be rated for 15.1V max (as are some newer vehicles). Anything above 15.1V continuous will boil the water out of a new wet cell and kill an older one real fast. Smart charges dont hold a cell at the higher levels during the entire cycle. The truck has the 55 amp stock alternator. Ive ran dual alternators in several of my creations of the past, (like this thing) but Id rather avoid the complexity if possible. Still, its hard to justify 18% more lumens for almost 1/3rd more power. It would also be over-driving the drivers well above their design spec. Ive been warned that if a driver blows and creates a dead short, all my emitters will most likely go up with it.